sirop vs syrup of figs

sirop

noun
  • A kettle used in making sugar by the open-kettle process. 

  • A concentrated fruit drink; a cordial. 

syrup of figs

noun
  • A type of laxative made from figs. 

  • A wig. 

How often have the words sirop and syrup of figs occurred in a corpus of books? (source: Google Ngram Viewer )